FILE - In this Tuesday April 20, 2010 file photo, Emirates Airline passenger jets taxi on the tarmac at Dubai International airport in Dubai, United Arab Emirates. The CEOs of American Airlines and Delta Air Lines on Thursday, Sept. 17, 2015 met with Secretary of State John Kerry as they stepped up their fight against what they say is unfair competition from the three biggest Middle East airlines. (AP Photo/Kamran Jebreili, File)